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<title>无序列表</title>
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<h2>衣服</h2>
<ul type="circle">                        <!--对ul应用type=circle-->
	<li>T恤</li>
	<li>连衣裙</li>
	<li>裤子</li>
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<h2>传智播客学科</h2>
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    <li>网页平面</li>                     <!--不定义type属性-->               
    <li type="square">Java</li>          <!--对li应用type=square-->
    <li type="disc">PHP</li>             <!--对li应用type=disc-->
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